The Supreme Court refused to hear an appeal of this ruling:
A seventh-grader from Vermont was suspended for wearing a shirt that bore images of cocaine and a martini glassÖbut also had messages calling President Bush a lying drunk driver who abused cocaine and marijuana, and the “chicken-hawk-in-chief” who was engaged in a “world domination tour.” […]
Williamstown Middle School Principal Kathleen Morris-Kortz said the images violated the school dress code, which prohibits clothing that promotes the use of drugs or alcohol.
An appeals court said the school had no right to censor any part of the shirt.
This is good news in the context of the Bong Hits decision, as it verifies that schools are restricted from censoring political speech, and that images of marijuana leaves, for example, when used in political context, are political speech, not a promotion of illegal activity.
This was an issue for me a few years ago, when the residence halls at Illinois State University denied permission to distribute flyers for hempfest because of the presence of a hemp leaf on the flyer.